I would want to be very clear as to what is the history of this school. Most 'new' schools are actually amalgamations of previous schools, and often failing schools.
Where have the Management come from, and how have they been able to make the staff gel together as a team?
You say dd will be the second year intake - do you mean there are no older children in the school? And they are just taking on one year at a time?
Obviously in terms of advantages you can expect new/state-of-the art facilities and resources.
However, many schools take a few weeks to get into the swing of things in a regular September, just with the rate that things change in schools these days; there are usually new Schemes of Work and so on in at least one subject or year group. With a whole new school it is likely that all teachers will be teaching mostly new Schemes of Work for all classes. This is particularly demanding.
In my town there will be major secondary schools re-organisation during the time my boys will be at secondary. (Probably expanding two schools, closing three schools, and opening one new huge academy.) It will be a time of great disruption, and is one of the (many) reasons that my boys will not be going to one of the schools that are being re-organised. I don't want them to be guinea pigs.